[PATCH 1/3] dt-bindings: iio: potentiometer: Add the Renesas X9250 potentiometers

[Herve Codina <herve.codina@bootlin.com>]

The Renesas X9250 is a quad digitally controlled potentiometers.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 .../iio/potentiometer/renesas,x9250.yaml      | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/potentiometer/renesas,x9250.yaml

diff --git a/Documentation/devicetree/bindings/iio/potentiometer/renesas,x9250.yaml b/Documentation/devicetree/bindings/iio/potentiometer/renesas,x9250.yaml
new file mode 100644
index 000000000000..e0433cd522aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/potentiometer/renesas,x9250.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/potentiometer/renesas,x9250.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas X9250 quad potentiometers
+
+maintainers:
+  - Herve Codina <herve.codina@bootlin.com>
+
+description:
+  The Renesas X9250 integrates four digitally controlled potentiometers.
+  On each potentiometer, the X9250T has a 100 kOhms total resistance and the
+  X9250U has a 50 kOhms total resistance.
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml
+  - $ref: /schemas/iio/iio.yaml
+
+properties:
+  compatible:
+    enum:
+      - renesas,x9250t
+      - renesas,x9250u
+
+  reg:
+    description:
+      SPI device address.
+    maxItems: 1
+
+  '#io-channel-cells':
+    const: 1
+
+  spi-max-frequency:
+    maximum: 2000000
+
+required:
+  - compatible
+  - reg
+  - '#io-channel-cells'
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        x9250@0 {
+            compatible = "renesas,x9250t";
+            reg = <0>;
+            spi-max-frequency = <2000000>;
+            #io-channel-cells = <1>;
+        };
+    };
-- 
2.39.2